Video data self-adapting partition device in encoder

Abstract

The invention provides a video data self-adapting dividing device in an encoder, wherein, the encoder receives channel data; the video data self-adapting dividing device divides M video frames; one or a plurality of video units are obtained after respectively dividing each video frame; each video unit comprises a plurality of macro blocks; the video units are then used for filling data blocks of physical layers, and each physical layer is guaranteed to comprise a plurality of video units. The video data self-adapting dividing device of the invention is combined with the characteristics of physical channels through self-adapting dividing video data units and by full utilization of data dividing method of information sources and meets as possible the requirement that an image strip or a subdivision is filled in a physical data package, thereby video errors are isolated in the image strip or the subdivision under the condition of abnormality of channels, consequently the invention has the advantages of effective avoidance of expansion of image flaws, improvement of image subjective quality and obvious improvement of anti-error capacity of video data.

Description

technical field [0001] The invention belongs to the technical field of mobile multimedia broadcasting or mobile phone television, and in particular relates to a video data self-adaptive segmentation device in an encoder. Background technique [0002] Mobile multimedia broadcasting is a multimedia playback technology that has emerged in recent years. Users can watch TV while moving at high speed through a handheld terminal. The terminal receives the program list through the wireless protocol, and can select a channel that it has the right to watch, so that it can receive multimedia data of the selected channel, and realize watching TV on the mobile terminal. [0003] The air data transmitted by the system is divided into different channels. The data of each channel includes three types: video, audio and auxiliary data. The terminal can receive relevant data, and realize the normal broadcasting of TV through the player on the terminal. [0004] When transmitting, the video d...

AI Technical Summary

Problems solved by technology

[0005] However, the existing video data channel encapsulation methods often only consider the characteristics of the physical channel, rigidly and mechanically cut the video stream according to the capacity of the data packet, and do not consider the relevance of the video content

The existing cutting methods are often not accurate to the macro block. The general method is: if an image frame is too large, it will be hard cut to a fixed size. Generally, the maximum IP packet size of the IP network is only 1500 bytes, and hard cutting will be used. The method, each packet has a fixed size of 1500 bytes. If it is in a TS packet, it also adopts a fixed-size cutting method, so that it can be placed in a fixed-size TS packet instead of an integer number of macroblocks for cutting

In this way, when there is an abnormality in the channel, in view of the spatial domain and time domain correlation of the signal source compression, the error will expand in space, which is not conducive to image concealment, and even magnifies the defect

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